Chemiresistive gas sensor based on spray pyrolyzed fluorine doped tin oxide films for trimethylamine detection
Abstract
Gas sensors based on nanocrystalline undoped tin oxide (SnO2) and fluorine-doped tin oxide (SnO2:F) thin films were prepared using an economical nebulized spray pyrolysis technique. The 0.3M precursor tin oxide solutions with varying fluorine doping concentrations (0, 20, and 40mol%) were deposited on glass substrates at 300oC. The X-ray Diffraction (XRD) and scanning electron microscopy (SEM) analyses confirmed the formation of nanocrystalline rutile structured SnO2 and SnO2:F continuous films with particle sizes ranging from 173 nm to 452 nm. The SnO2:F (40mol%) film based sensors exhibited an enhanced room temperature response to trimethylamine compared to its undoped counterpart.
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Physics at the front and center: Strengthening core values in physics research
18–21 August 2016, University of the Philippines Visayas, Iloilo City
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